论文标题

Kuiper Belt物体的地质和地球物理学(486958)ARROKOTH

The Geology and Geophysics of Kuiper Belt Object (486958) Arrokoth

论文作者

Spencer, J. R., Stern, S. A., Moore, J. M., Weaver, H. A., Singer, K. N., Olkin, C. B., Verbiscer, A. J., McKinnon, W. B., Parker, J. Wm., Beyer, R. A., Keane, J. T., Lauer, T. R., Porter, S. B., White, O. L., Buratti, B. J., El-Maarry, M. R., Lisse, C. M., Parker, A. H., Throop, H. B., Robbins, S. J., Umurhan, O. M., Binzel, R. P., Britt, D. T., Buie, M. W., Cheng, A. F., Cruikshank, D. P., Elliott, H. A., Gladstone, G. R., Grundy, W. M., Hill, M. E., Horanyi, M., Jennings, D. E., Kavelaars, J. J., Linscott, I. R., McComas, D. J., McNutt, R. L., Protopapa, S., Reuter, D. C., Schenk, P. M., Showalter, M. R., Young, L. A., Zangari, A. M., Abedin, A. Y., Beddingfield, C. B., Benecchi, S. D., Bernardoni, E., Bierson, C. J., Borncamp, D., Bray, V. J., Chaikin, A. L., Dhingra, R. D., Fuentes, C., Fuse, T., Gay, P. L, Gwyn, S. D. J., Hamilton, D. P., Hofgartner, J. D., Holman, M. J., Howard, A. D., Howett, C. J. A., Karoji, H., Kaufmann, D. E., Kinczyk, M., May, B. H., Mountain, M., Pätzold, M., Petit, J. M., Piquette, M. R., Reid, I. N., Reitsema, H. J., Runyon, K. D., Sheppard, S. S., Stansberry, J. A., Stryk, T., Tanga, P., Tholen, D. J., Trilling, D. E., Wasserman, L. H.

论文摘要

冷古典kuiper带是海王星以外未受干扰的轨道中的一类小体,是保存有关太阳系形成的信息的原始物体。新的地平线航天器飞越了这些物体之一,36公里长的接触二进制(486958)ARROKOTH(2014 MU69),2019年1月。来自Flyby的图像表明,ARROKOTH没有可检测到的环,没有卫星的卫星,并且在8000 km的范围内没有8000 km的卫星,并且没有8000 km-ymige,并且没有较大的座位,并且没有卫星的光线,并且没有卫星的光线,并且没有卫星的光线,并且没有卫星的光线,并且没有卫星的光。访问的太阳系机构。冲击坑的密度表明表面的日期是太阳系的形成。接触二进制的两个裂片具有紧密对准的杆和赤道,从而限制了它们的积聚机制。

The Cold Classical Kuiper Belt, a class of small bodies in undisturbed orbits beyond Neptune, are primitive objects preserving information about Solar System formation. The New Horizons spacecraft flew past one of these objects, the 36 km long contact binary (486958) Arrokoth (2014 MU69), in January 2019. Images from the flyby show that Arrokoth has no detectable rings, and no satellites (larger than 180 meters diameter) within a radius of 8000 km, and has a lightly-cratered smooth surface with complex geological features, unlike those on previously visited Solar System bodies. The density of impact craters indicates the surface dates from the formation of the Solar System. The two lobes of the contact binary have closely aligned poles and equators, constraining their accretion mechanism.

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